Drill tool adapter

ABSTRACT

This invention relates to an adapter for portable power drills whereby the same may be used to provide power for operations other than drilling as, for example, for scraping, grinding or buffing. The tool to be used has a shaft which is engaged by the drill chuck and rotatably driven in the usual manner. In order to guide the tool as it is used the shaft rotates in a bearing adjacent the tool and that bearing is, in turn, provided with an handle pivotally secured thereto whereby the tool may be guided while the rotating tool shaft is steadied and prevented from chattering by the additional bearing support.

[451 Apr. 17, 1973 1,193,361 8/1916 Crepeau............................l5/104.09

[ DRILL TOOL ADAPTER Chris Marion Brueck, Po. Box 201, Wilton Junction, Iowa 52778 May 13, 1971 Primary Examiner-Leon G. Machlin [76] Inventor:

Attomey--l-Ii1l, Sherman, Meroni, Gross & Simpson [22] Filed:

Appl. No.: 142,929

[ ABSTRACT This invention relates to an adapter for portable [52] US. Cl...........................15/93 R, 15/236, 125/3 power drills whereby the m m y be se to provide power for operations other than drilling as, for exam- [51] Int. ll/l4 ...l5/93, 236, 97, 179,

[58] Field of ple, for scraping, grinding or buffing. The tool to be 15/144, 143, 104.01, 104.02, 104.03, used has a shaft which is engaged by the drill chuck 104.05, 104.09, 104.1, 104.13; 144/115, and rotatably driven in the usual manner. In order to 118; 145/4-2; l25/35; 114/ 22; guide the tool as it is used the shaft rotates in a bearing adjacent the tool and that bearing is, in turn, pro- 1 References Cited vided with an handle pivotally secured thereto whereby the tool may be guided while the rotating tool shaft is steadied and prevented from chattering by the additional bearing support. 1

UNITED STATES PATENTS 8 Clains, 7 Drawing Figures Wa1ters....... Taylor PATENTEDAPRITIQB 3,727, 258

SHEET 2 OF 2 INVENTOR.

k/5 wk/o/i/ Bkuacz BY M Wml A TORNEYS DRILL TOOL ADAPTER BACKGROUND OF THE INVENTION Summary of the Invention It is known in the art to provide attachments for rotatable operation by the driving mechanisms of portable power tools. However, attachment of tools for such operation includes a shaft which is secured to the drill chuck for rotating thereby in the same manner that a drill bit is normally driven. Since the tool to be operated is normally connected to the outer end of said shaft it is difficult to position or guide the tool and operation of the tool at the outer end of the shaft may result in undesirable chattering.

The present invention overcomes these difficulties by providing a hearing which rotatably supports the shaft near the outer end thereof adjacent to and preferably inwardly of the adapter tool. Pivotally attached to that hearing is a handle member which is held by the operator and moved to position the tool as desired. This holding of the handle also supports the bearing to prevent chattering.

The adapter may be used as a paint scraper wherein blades at the end of the shaft and rotatable thereby are moved into contact with a surface from which paint or other coating materials are to be scraped-an operation which would be impracticable if the additional bearing and supporting and guiding handle were not provided. In a preferred embodiment, the scraping blades comprise parts of broken hacksaw blades removably secured in a carrying member attached to the end of the shaft and rotatable therewith.

The provision of the shaft bearing and supporting handle also facilitates the use of the adapter in other power tool operations, such as grinding and buffing.

FIG. 7 is a side elevation view showing the device of parent from the disclosures in the drawings and in the following description.

The invention in a preferred form is shown in the drawings and hereinafter more fully described.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation view of a power'operated drill equipped with the adapter of this invention, in this instance a paint scraper;

FIG. 2 is an enlarged detailed view showing the mounting of the supplemental bearing and of the paint scraper blades;

use with a grinding or buffing wheel.

DETAILED DESCRIPTION OF THE DRAWINGS The outer end of the shaft 4 is supported by a bearing 5 in which it rotates, said bearing being preferably made of cast aluminum or other metal light in weight and having a relatively low coefficient of friction with the rotating shaft. The bearing 5 is held against inward movement along the shaft by a pin 6 and washer 7. Secured to the end of the shaft for rotation therewith is a clevis 8 on which is pivotally mounted at 9 a blade carrying member 10 which, in turn, is provided with a longitudinal slot 11 in which there may be mounted sections of hacksaw blades or similar members 12 which conveniently may be used in a paint scraping operation. These blade or scraping members 12 are restrained against inward movement in the outer groove 11 by pins 13 and are secured to the blade carrying member 10 by set screws 14 (see FIG. 4).

The clevis 8 is preferably attached to the outer end of the shaft 4 by a threaded connection 8a and the inner end of the clevis member is so attached as to limit outward movement of the bearing 5.

The bearing 5 is adapted to be supported and guided (thus effecting guiding of the entire tool) by a handle member comprising a clevis 15 pivotally attached to the bearing member and having an angularly projecting portion 16 on which the handle 17 of plastic, wood or any desirable material is rotatably mounted. 7

As will be apparent from the foregoing description, the bearing 5 rotatably carries and supports the outer end of the shaft 4 and that bearing is, in turn, supported by the hand of the operator grasping the handle 17 to guide the tool.

By reason of the pivotally mounted blade carrier member 10, adjustments of the tool to irregular surfaces are facilitated and the device is capable of operation to provide a very efficient tool for the scraping of paint or other surface coatings.

In the form of the tool shown in FIGS. 5 and 6, the construction is as above described with the exception that the four-bladed scraper tool is carried by a universal joint 18 secured to the end of the shaft 4 outwardly of the bearing 5. In this form of the invention the blade carrying member designated by the reference numeral 19 is of a cruciform shape and is provided with slots at right angles to each other to carry blade segments 12 in the same manner as the blade segments 12 are carried by the two-blade scraper member previously described. By supplanting the clevis member 8 of the first form described with the universal joint 18 it is possible to permit of automatic adjustment of the scraping blades to various surfaces.

In the form of the invention shown in FIG. 7, the same adapter shaft 4, bearing 5 and handle member as above described are provided. However, in this instance, the outer end of the shaft 4 drives another chuck member 20 which is used for attachment to a buffing wheel, grinding wheel or the like. Here again, however, the outer end of the shaft 4 is steadied and is positionable by the hand-held bearing member 5.

In this form of the invention the bearing member 5 is preferably held from movement longitudinally of the shaft 4 not only by the washer 7 and pin 6 above described positioned inwardly of the bearing member but by similar members 7a and 6a positioned outwardly of the bearing member.

The drill tool adapter of this invention is particularly desirable in providing an adapter attachment for the power operation of paint scrapers such as herein shown and described. However, because of the guiding and anti-chattering action of the hand-held bearing 5 the principles of this invention are readily adaptable to the attachment of other tools to be operated by the power operated drill, such for example as bufi'ing wheels, grinding wheels and the like which may be attached at the chuck 20.

The scraper blades in the apparatus of this invention may, of course, be constructed of hardened metal and specially made for use with the adapter. However, it has been found that this adapter is particularly useful by the utilization of broken portions of hacksaw blades which provide excellent scraping blades.

I am aware that various details of this invention may be changed and I, therefore, do not purpose limiting the patent granted hereon otherwise than indicated by the scope of the appended claims.

I claim:

1. In a adapter for use with portable power operated tools including means for removably securing a tool such as a drill bit for rotation thereby,

a shaft adapted to be engaged by said tool securing means for rotation thereby,

a bearing carried by the shaft and in which the shaft is rotatable at apoint outside the point of attachment of the shaft of the power tool securing means.

a handle having a forked member extending along either side of said bearing and pivotally attached thereto, and

a tool secured to the outer end of the shaft for rotation thereby.

2. A power tool adapter as defined in claim 1, wherein the handle is at an obtuse angle to the fork member.

3. A power tool adapter is defined in claim I. wherein a collar on the shaft prevents inward movement of the bearing toward the tool securing means.

4. A power tool adapter as defined in claim 1,

wherein the bearing is made of relatively lightweight material.

5. A power tool adapter as defined in claim 1, wherein the bearing is made of cast aluminum.

6. A power tool adapter as defined in claim 1, wherein the tool secured to the outer end of the shaft comprises arms extending laterally in a plane normal to the axis of the shaft and carries scraping blades removably secured thereto.

7. A power tool adapter as defined in claim 6, I

wherein the scraping blades are made from broken hacksaw blades.

8. A power tool adapter as defined in claim 1,

wherein the tool secured to the outer end of the shaft comprises a channelled member extending from either 

1. In a adapter for use with portable power operated tools including means for removably securing a tool such as a drill bit for rotation thereby, a shaft adapted to be engaged by said tool securing means for rotation thereby, a bearing carried by the shaft and in which the shaft is rotatable at a point outside the point of attachment of the shaft of the power tool securing means. a handle having a forked member extending along either side of said bearing and pivotally attached thereto, and a tool secured to the outer end of the shaft for rotation thereby.
 2. A power tool adapter as defined in claim 1, wherein the handle is at an obtuse angle to the fork member.
 3. A power tool adapter is defined in claim 1, wherein a collar on the shaft prevents inward movement of the bearing toward the tool securing means.
 4. A power tool adapter as defined in claim 1, wherein the bearing is made of relatively lightweight material.
 5. A power tool adapter as defined in claim 1, wherein the bearing is made of cast aluminum.
 6. A power tool adapter as defined in claim 1, wherein the tool secured to the outer end of the shaft comprises arms extending laterally in a plane normal to the axis of the shaft and carries scraping blades removably secured thereto.
 7. A power tool adapter as defined in claim 6, wherein the scraping blades are made from broken hacksaw blades.
 8. A power tool adapter as defined in claim 1, wherein the tool secured to the outer end of the shaft comprises a channelled member extending from either side of the shaft in a plane normal to the axis thereof and wherein scraping blades are removably mounted in the channels of said member. 